It's also known as seven layer dip. I have a friend who is obsessed with it, and makes it every time I see him!
Layer refried beans (some add chilli, ground cumin, ground coriander, canned corn), grated cheese, sour cream, guacamole, tomato salsa, chopped coriander and spring onion, sliced black olives. Some people have a layer of meat on the bottom (I guess they don't count the olives as a layer then?), some switch the order of the layers around a bit. Serve with corn chips.